Re: NANFA-- Daphnia

Al G Eaton (sege7_2000_at_yahoo.com)
Wed, 3 Mar 2004 16:58:01 -0800 (PST)

Daphnia reproduce one of two ways. Asexually, called
something like parthogenetically I think and sexually
when there are males present and conditions aren't
optimum. Normally a population of daphnia consists of
almost all females and the females release little
clones every couple of days. When a male daphnia
mates with a female, egg packets are formed and are
oblong and black. These become resting eggs and only
hatch when conditions become more favorable. You can
see the egg packets under the carapace of the females
a little more easily than you can see the clones, but
with close observation you should be able to see them
too.

Klaus



> Sounds about right to me, I really didn't think
> daphnia had egg sacs but laid
> eggs one at a time. BTW do you see any more of those
> giant cyclops lately?
> they were very cool.
>
> Moon

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